[jira] [Created] (LUCENE-7576) RegExp automaton causes NPE on Terms.intersect

["Tom Mortimer (JIRA)" <ji...@apache.org>]

Tom Mortimer created LUCENE-7576:
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             Summary: RegExp automaton causes NPE on Terms.intersect
                 Key: LUCENE-7576
                 URL: https://issues.apache.org/jira/browse/LUCENE-7576
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/codecs, core/index
    Affects Versions: 6.2.1
         Environment: java version "1.8.0_77" macOS 10.12.1
            Reporter: Tom Mortimer
            Priority: Minor


Calling org.apache.lucene.index.Terms.intersect(automaton, null) causes an NPE:

    String index_path = <path to index>
    String term = <a valid term name>

    Directory directory = FSDirectory.open(Paths.get(index_path));
    IndexReader reader = DirectoryReader.open(directory);
    Fields fields = MultiFields.getFields(reader);
    Terms terms = fields.terms(args[1]);
    CompiledAutomaton automaton = new CompiledAutomaton(
      new RegExp("do_not_match_anything").toAutomaton());

    TermsEnum te = terms.intersect(automaton, null);

throws:

Exception in thread "main" java.lang.NullPointerException
	at org.apache.lucene.codecs.blocktree.IntersectTermsEnum.<init>(IntersectTermsEnum.java:127)
	at org.apache.lucene.codecs.blocktree.FieldReader.intersect(FieldReader.java:185)
	at org.apache.lucene.index.MultiTerms.intersect(MultiTerms.java:85)
        ...




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